Here is a great tip for I phone users:
If you need to magnify the iPhone’s screen, for ease in reading tiny type, try double-tapping with three fingers. Then pan around by dragging with three fingers.
In order to turn that feature on, tap Settings, then General, then Accessibility. (On the same screen, you’ll find an option to make the text bigger in the built-in iPhone programs, which is handy in its own way.)
then again, what if your screen image suddenly become mysteriously enlarged? There’s nothing quite as alarming as seeing jumbo text and graphics, and nothing restores the phone to the way it’s supposed to be.
I can’t tell you how many people trek off to the Apple Store to get their “broken” iPhones fixed. Of course, the real problem is that you’ve accidentally turned on screen zooming (described in the previous tip). Double-tap with three fingers to restore the screen magnification.